An ultrastrong nanofibrillar biomaterial: The strength of single cellulose nanofibrils revealed via sonication-induced fragmentation
2013 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 14, no 1, 248-253 p.Article in journal (Refereed) Published
We report the mechanical strength of native cellulose nanofibrils. Native cellulose nanofibrils, purified from wood and sea tunicate, were fully dispersed in water via a topochemical modification of cellulose nanofibrils using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) as a catalyst. The strength of individual nanofibrils was estimated based on a model for the sonication-induced fragmentation of filamentous nanostructures. The resulting strength parameters were then analyzed based on fracture statistics. The mean strength of the wood cellulose nanofibrils ranged from 1.6 to 3 GPa, depending on the method used to measure the nanofibril width. The highly crystalline, thick tunicate cellulose nanofibrils exhibited higher mean strength of 3-6 GPa. The strength values estimated for the cellulose nanofibrils in the present study are comparable with those of commercially available multiwalled carbon nanotubes.
Place, publisher, year, edition, pages
2013. Vol. 14, no 1, 248-253 p.
Atomic-Force Microscopy, Transmission Electron-Microscopy, Tempo-Oxidized Cellulose, Elastic-Modulus, Crystalline Regions, Carbon Nanotubes, Native Cellulose, Induced Scission, Mechanism, Bacterial
Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-118204DOI: 10.1021/bm301674eISI: 000313605800030ScopusID: 2-s2.0-84872561106OAI: oai:DiVA.org:kth-118204DiVA: diva2:605123
QC 201302132013-02-132013-02-132013-02-14Bibliographically approved